This series aims to clarify the behavior of the KVM_GET_EMULATED_CPUID
ioctl, and fix a corner case where -E2BIG is returned when
the nent field of struct kvm_cpuid2 is matching the amount of
emulated entries that kvm returns.
Patch 1 proposes the nent field fix to cpuid.c,
patch 2 updates the ioctl documentation accordingly and
patches 3 and 4 extend the x86_64/get_cpuid_test.c selftest to check
the intended behavior of KVM_GET_EMULATED_CPUID.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@xxxxxxxxxx>
---
v3:
- clearer commit message and problem explanation
- pre-initialize the stack variable 'entry' in __do_cpuid_func_emulated
so that the various eax/ebx/ecx are initialized if not set by func.
Emanuele Giuseppe Esposito (4):
KVM: x86: Fix a spurious -E2BIG in KVM_GET_EMULATED_CPUID
Documentation: KVM: update KVM_GET_EMULATED_CPUID ioctl description
selftests: add kvm_get_emulated_cpuid to processor.h
selftests: KVM: extend get_cpuid_test to include
KVM_GET_EMULATED_CPUID
Documentation/virt/kvm/api.rst | 10 +--
arch/x86/kvm/cpuid.c | 33 ++++---
.../selftests/kvm/include/x86_64/processor.h | 1 +
.../selftests/kvm/lib/x86_64/processor.c | 33 +++++++
.../selftests/kvm/x86_64/get_cpuid_test.c | 90 ++++++++++++++++++-
5 files changed, 142 insertions(+), 25 deletions(-)
--
2.30.2
